/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "config.h"
#endif /* HAVE_CONFIG_H */
+#define DISABLE_STATEV
+
#include <float.h>
#include "array.h"
#include "irbitset.h"
#include "error.h"
#include "list.h"
+#include "statev.h"
#include "irbitset.h"
#endif
-static int last_chunk_id = 0;
-static int recolor_limit = 4;
+typedef float real_t;
+#define REAL(C) (C ## f)
+
+static unsigned last_chunk_id = 0;
+static int recolor_limit = 7;
+static real_t dislike_influence = REAL(0.1);
typedef struct _col_cost_t {
- int col;
- double cost;
+ int col;
+ real_t cost;
} col_cost_t;
/**
* An affinity chunk.
*/
typedef struct _aff_chunk_t {
- ir_node **n; /**< An ARR_F containing all nodes of the chunk. */
- bitset_t *nodes; /**< A bitset containing all nodes inside this chunk. */
- bitset_t *interfere; /**< A bitset containing all interfering neighbours of the nodes in this chunk. */
- int weight; /**< Weight of this chunk */
- unsigned weight_consistent : 1; /**< Set if the weight is consistent. */
- unsigned deleted : 1; /**< Set if the was deleted. */
- int id; /**< For debugging: An id of this chunk. */
+ const ir_node **n; /**< An ARR_F containing all nodes of the chunk. */
+ const ir_node **interfere; /**< An ARR_F containing all inference. */
+ int weight; /**< Weight of this chunk */
+ unsigned weight_consistent : 1; /**< Set if the weight is consistent. */
+ unsigned deleted : 1; /**< For debugging: Set if the was deleted. */
+ unsigned id; /**< An id of this chunk. */
+ unsigned visited;
+ col_cost_t color_affinity[1];
} aff_chunk_t;
/**
* An affinity edge.
*/
typedef struct _aff_edge_t {
- ir_node *src; /**< Source node. */
- ir_node *tgt; /**< Target node. */
- double weight; /**< The weight of this edge. */
+ const ir_node *src; /**< Source node. */
+ const ir_node *tgt; /**< Target node. */
+ int weight; /**< The weight of this edge. */
} aff_edge_t;
/* main coalescing environment */
int k; /**< number of non-ignore registers in class */
bitset_t *ignore_regs; /**< set containing all global ignore registers */
ir_phase ph; /**< phase object holding data for nodes */
- pqueue *chunks; /**< priority queue for chunks */
+ pqueue_t *chunks; /**< priority queue for chunks */
pset *chunkset; /**< set holding all chunks */
be_ifg_t *ifg; /**< the interference graph */
const arch_env_t *aenv; /**< the arch environment */
copy_opt_t *co; /**< the copy opt object */
+ unsigned chunk_visited;
+ col_cost_t **single_cols;
} co_mst_env_t;
/* stores coalescing related information for a node */
typedef struct _co_mst_irn_t {
- ir_node *irn; /**< the irn this information belongs to */
+ const ir_node *irn; /**< the irn this information belongs to */
aff_chunk_t *chunk; /**< the chunk this irn belongs to */
bitset_t *adm_colors; /**< set of admissible colors for this irn */
ir_node **int_neighs; /**< array of all interfering neighbours (cached for speed reasons) */
int tmp_col; /**< a temporary assigned color */
unsigned fixed : 1; /**< the color is fixed */
struct list_head list; /**< Queue for coloring undo. */
+ real_t constr_factor;
} co_mst_irn_t;
#define get_co_mst_irn(mst_env, irn) (phase_get_or_set_irn_data(&(mst_env)->ph, (irn)))
* Write a chunk to stderr for debugging.
*/
static void dbg_aff_chunk(const co_mst_env_t *env, const aff_chunk_t *c) {
- bitset_pos_t idx;
+ int i, l;
+ (void) env;
if (c->weight_consistent)
ir_fprintf(stderr, " $%d ", c->weight);
ir_fprintf(stderr, "{");
- bitset_foreach(c->nodes, idx) {
- ir_node *n = get_idx_irn(env->co->irg, idx);
+ for (i = 0, l = ARR_LEN(c->n); i < l; ++i) {
+ const ir_node *n = c->n[i];
ir_fprintf(stderr, " %+F,", n);
}
ir_fprintf(stderr, "}");
if (bitset_popcnt(node->adm_colors) < 1)
fprintf(stderr, "no admissible colors?!?");
else {
- bitset_foreach(node->adm_colors, idx)
+ bitset_foreach(node->adm_colors, idx) {
fprintf(stderr, " %d", idx);
+ }
}
}
*/
static void dbg_col_cost(const co_mst_env_t *env, const col_cost_t *cost) {
int i;
- for (i = 0; i < env->n_regs; ++i) {
- if (cost[i].cost == COL_COST_INFEASIBLE)
- fprintf(stderr, " (%d, INF)", cost[i].col);
- else
- fprintf(stderr, " (%d, %.1f)", cost[i].col, cost[i].cost);
- }
+ for (i = 0; i < env->n_regs; ++i)
+ fprintf(stderr, " (%d, %.4f)", cost[i].col, cost[i].cost);
}
#endif /* DEBUG_libfirm */
}
/** compares to color-cost pairs */
-static int cmp_col_cost(const void *a, const void *b) {
+static __attribute__((unused)) int cmp_col_cost_lt(const void *a, const void *b) {
const col_cost_t *c1 = a;
const col_cost_t *c2 = b;
- double diff = c1->cost - c2->cost;
+ real_t diff = c1->cost - c2->cost;
+ return (diff > 0) - (diff < 0);
+}
+
+static int cmp_col_cost_gt(const void *a, const void *b) {
+ const col_cost_t *c1 = a;
+ const col_cost_t *c2 = b;
+ real_t diff = c2->cost - c1->cost;
return (diff > 0) - (diff < 0);
}
* Creates a new affinity chunk
*/
static INLINE aff_chunk_t *new_aff_chunk(co_mst_env_t *env) {
- aff_chunk_t *c = xmalloc(sizeof(*c));
+ aff_chunk_t *c = xmalloc(sizeof(*c) + (env->n_regs - 1) * sizeof(c->color_affinity[0]));
+ c->n = NEW_ARR_F(const ir_node *, 0);
+ c->interfere = NEW_ARR_F(const ir_node *, 0);
c->weight = -1;
c->weight_consistent = 0;
- c->n = NEW_ARR_F(ir_node *, 0);
- c->nodes = bitset_irg_malloc(env->co->irg);
- c->interfere = bitset_irg_malloc(env->co->irg);
- c->id = last_chunk_id++;
+ c->deleted = 0;
+ c->id = ++last_chunk_id;
+ c->visited = 0;
pset_insert(env->chunkset, c, c->id);
return c;
}
*/
static INLINE void delete_aff_chunk(co_mst_env_t *env, aff_chunk_t *c) {
pset_remove(env->chunkset, c, c->id);
- bitset_free(c->nodes);
- bitset_free(c->interfere);
+ DEL_ARR_F(c->interfere);
DEL_ARR_F(c->n);
c->deleted = 1;
free(c);
}
+/**
+ * binary search of sorted nodes.
+ *
+ * @return the position where n is found in the array arr or ~pos
+ * if the nodes is not here.
+ */
+static INLINE int nodes_bsearch(const ir_node **arr, const ir_node *n) {
+ int hi = ARR_LEN(arr);
+ int lo = 0;
+
+ while (lo < hi) {
+ int md = lo + ((hi - lo) >> 1);
+
+ if (arr[md] == n)
+ return md;
+ if (arr[md] < n)
+ lo = md + 1;
+ else
+ hi = md;
+ }
+
+ return ~lo;
+}
+
+/** Check if a node n can be found inside arr. */
+static int node_contains(const ir_node **arr, const ir_node *n) {
+ int i = nodes_bsearch(arr, n);
+ return i >= 0;
+}
+
+/**
+ * Insert a node into the sorted nodes list.
+ *
+ * @return 1 if the node was inserted, 0 else
+ */
+static int nodes_insert(const ir_node ***arr, const ir_node *irn) {
+ int idx = nodes_bsearch(*arr, irn);
+
+ if (idx < 0) {
+ int i, n = ARR_LEN(*arr);
+ const ir_node **l;
+
+ ARR_APP1(const ir_node *, *arr, irn);
+
+ /* move it */
+ idx = ~idx;
+ l = *arr;
+ for (i = n - 1; i >= idx; --i)
+ l[i + 1] = l[i];
+ l[idx] = irn;
+ return 1;
+ }
+ return 0;
+}
+
/**
* Adds a node to an affinity chunk
*/
static INLINE void aff_chunk_add_node(aff_chunk_t *c, co_mst_irn_t *node) {
int i;
- if (bitset_is_set(c->nodes, get_irn_idx(node->irn)))
+ if (! nodes_insert(&c->n, node->irn))
return;
c->weight_consistent = 0;
node->chunk = c;
- bitset_set(c->nodes, get_irn_idx(node->irn));
-
- ARR_APP1(ir_node *, c->n, node->irn);
for (i = node->n_neighs - 1; i >= 0; --i) {
ir_node *neigh = node->int_neighs[i];
- bitset_set(c->interfere, get_irn_idx(neigh));
+ nodes_insert(&c->interfere, neigh);
}
}
/**
* In case there is no phase information for irn, initialize it.
*/
-static void *co_mst_irn_init(ir_phase *ph, ir_node *irn, void *old) {
+static void *co_mst_irn_init(ir_phase *ph, const ir_node *irn, void *old) {
co_mst_irn_t *res = old ? old : phase_alloc(ph, sizeof(res[0]));
co_mst_env_t *env = ph->priv;
- if (res != old) {
+ if (!old) {
const arch_register_req_t *req;
void *nodes_it = be_ifg_nodes_iter_alloca(env->ifg);
ir_node *neigh;
/* exclude global ignore registers as well */
bitset_andnot(res->adm_colors, env->ignore_regs);
+ /* compute the constraint factor */
+ res->constr_factor = (real_t) (1 + env->n_regs - bitset_popcnt(res->adm_colors)) / env->n_regs;
+
/* set the number of interfering affinity neighbours to -1, they are calculated later */
res->int_aff_neigh = -1;
/**
* Check if affinity chunk @p chunk interferes with node @p irn.
*/
-static INLINE int aff_chunk_interferes(co_mst_env_t *env, const aff_chunk_t *chunk, ir_node *irn) {
- (void) env;
- return bitset_is_set(chunk->interfere, get_irn_idx(irn));
+static INLINE int aff_chunk_interferes(const aff_chunk_t *chunk, const ir_node *irn) {
+ return node_contains(chunk->interfere, irn);
}
/**
* Check if there are interference edges from c1 to c2.
- * @param env The global co_mst environment
* @param c1 A chunk
* @param c2 Another chunk
* @return 1 if there are interferences between nodes of c1 and c2, 0 otherwise.
*/
-static INLINE int aff_chunks_interfere(co_mst_env_t *env, const aff_chunk_t *c1, const aff_chunk_t *c2) {
- (void) env;
+static INLINE int aff_chunks_interfere(const aff_chunk_t *c1, const aff_chunk_t *c2) {
+ int i;
+
if (c1 == c2)
return 0;
/* check if there is a node in c2 having an interfering neighbor in c1 */
- return bitset_intersect(c1->interfere, c2->nodes);
+ for (i = ARR_LEN(c2->n) - 1; i >= 0; --i) {
+ const ir_node *irn = c2->n[i];
+
+ if (node_contains(c1->interfere, irn))
+ return 1;
+ }
+ return 0;
}
/**
* Returns the affinity chunk of @p irn or creates a new
* one with @p irn as element if there is none assigned.
*/
-static INLINE aff_chunk_t *get_aff_chunk(co_mst_env_t *env, ir_node *irn) {
+static INLINE aff_chunk_t *get_aff_chunk(co_mst_env_t *env, const ir_node *irn) {
co_mst_irn_t *node = get_co_mst_irn(env, irn);
return node->chunk;
}
* are no interference edges from chunk(src) to chunk(tgt)).
* @return 1 if successful, 0 if not possible
*/
-static int aff_chunk_absorb(co_mst_env_t *env, ir_node *src, ir_node *tgt) {
+static int aff_chunk_absorb(co_mst_env_t *env, const ir_node *src, const ir_node *tgt) {
aff_chunk_t *c1 = get_aff_chunk(env, src);
aff_chunk_t *c2 = get_aff_chunk(env, tgt);
#ifdef DEBUG_libfirm
- DB((dbg, LEVEL_4, "Attempt to let c1 (id %d): ", c1 ? c1->id : -1));
+ DB((dbg, LEVEL_4, "Attempt to let c1 (id %u): ", c1 ? c1->id : 0));
if (c1) {
DBG_AFF_CHUNK(env, LEVEL_4, c1);
} else {
DB((dbg, LEVEL_4, "{%+F}", src));
}
- DB((dbg, LEVEL_4, "\n\tabsorb c2 (id %d): ", c2 ? c2->id : -1));
+ DB((dbg, LEVEL_4, "\n\tabsorb c2 (id %u): ", c2 ? c2->id : 0));
if (c2) {
DBG_AFF_CHUNK(env, LEVEL_4, c2);
} else {
}
} else {
/* c2 already exists */
- if (! aff_chunk_interferes(env, c2, src)) {
+ if (! aff_chunk_interferes(c2, src)) {
aff_chunk_add_node(c2, get_co_mst_irn(env, src));
goto absorbed;
}
}
} else if (c2 == NULL) {
/* c1 already exists */
- if (! aff_chunk_interferes(env, c1, tgt)) {
+ if (! aff_chunk_interferes(c1, tgt)) {
aff_chunk_add_node(c1, get_co_mst_irn(env, tgt));
goto absorbed;
}
- } else if (c1 != c2 && ! aff_chunks_interfere(env, c1, c2)) {
+ } else if (c1 != c2 && ! aff_chunks_interfere(c1, c2)) {
int idx, len;
- for (idx = 0, len = ARR_LEN(c2->n); idx < len; ++idx) {
- ir_node *n = c2->n[idx];
- co_mst_irn_t *mn = get_co_mst_irn(env, n);
+ for (idx = 0, len = ARR_LEN(c2->n); idx < len; ++idx)
+ aff_chunk_add_node(c1, get_co_mst_irn(env, c2->n[idx]));
- mn->chunk = c1;
-
- if (! bitset_is_set(c1->nodes, get_irn_idx(n)))
- ARR_APP1(ir_node *, c1->n, n);
+ for (idx = 0, len = ARR_LEN(c2->interfere); idx < len; ++idx) {
+ const ir_node *irn = c2->interfere[idx];
+ nodes_insert(&c1->interfere, irn);
}
- bitset_or(c1->nodes, c2->nodes);
- bitset_or(c1->interfere, c2->interfere);
c1->weight_consistent = 0;
delete_aff_chunk(env, c2);
static void aff_chunk_assure_weight(co_mst_env_t *env, aff_chunk_t *c) {
if (! c->weight_consistent) {
int w = 0;
- int idx, len;
- double ratio = 0.0;
- int n_constr = 0;
+ int idx, len, i;
+
+ for (i = 0; i < env->n_regs; ++i) {
+ c->color_affinity[i].col = i;
+ c->color_affinity[i].cost = REAL(0.0);
+ }
for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *n = c->n[idx];
+ const ir_node *n = c->n[idx];
const affinity_node_t *an = get_affinity_info(env->co, n);
co_mst_irn_t *node = get_co_mst_irn(env, n);
- int col_cnt = bitset_popcnt(node->adm_colors);
- if (col_cnt < env->k) {
- /* calculate costs for constrained interfering neighbors */
- ratio += 1.0 - (double) col_cnt / env->k;
- n_constr += 1;
+ node->chunk = c;
+ if (node->constr_factor > REAL(0.0)) {
+ bitset_pos_t col;
+ bitset_foreach (node->adm_colors, col)
+ c->color_affinity[col].cost += node->constr_factor;
}
if (an != NULL) {
neighb_t *neigh;
co_gs_foreach_neighb(an, neigh) {
const ir_node *m = neigh->irn;
- const int m_idx = get_irn_idx(m);
/* skip ignore nodes */
if (arch_irn_is(env->aenv, m, ignore))
continue;
- w += bitset_is_set(c->nodes, m_idx) ? neigh->costs : 0;
+ w += node_contains(c->n, m) ? neigh->costs : 0;
}
}
}
- w *= 1.0 + (double) n_constr / ARR_LEN(c->n) * ratio;
+ for (i = 0; i < env->n_regs; ++i)
+ c->color_affinity[i].cost *= (REAL(1.0) / ARR_LEN(c->n));
c->weight = w;
+ // c->weight = bitset_popcnt(c->nodes);
c->weight_consistent = 1;
}
}
*/
static int count_interfering_aff_neighs(co_mst_env_t *env, const affinity_node_t *an) {
const neighb_t *neigh;
- ir_node *irn = an->irn;
+ const ir_node *irn = an->irn;
const co_mst_irn_t *node = get_co_mst_irn(env, irn);
int res = 0;
/* build the affinity edges */
co_gs_foreach_neighb(an, neigh) {
- ir_node *m = neigh->irn;
- int m_idx = get_irn_idx(m);
+ const ir_node *m = neigh->irn;
+ int m_idx = get_irn_idx(m);
/* record the edge in only one direction */
if (n_idx < m_idx) {
* these weights are pure hackery ;-).
* It's not chriswue's fault but mine.
*/
- edge.weight = (double)neigh->costs / (double)(1 + n1->int_aff_neigh + n2->int_aff_neigh);
+ edge.weight = neigh->costs;
ARR_APP1(aff_edge_t, edges, edge);
}
}
foreach_pset(env->chunkset, curr_chunk) {
aff_chunk_assure_weight(env, curr_chunk);
- DBG((dbg, LEVEL_1, "entry #%d", curr_chunk->id));
+ DBG((dbg, LEVEL_1, "entry #%u", curr_chunk->id));
DBG_AFF_CHUNK(env, LEVEL_1, curr_chunk);
DBG((dbg, LEVEL_1, "\n"));
pqueue_put(env->chunks, curr_chunk, curr_chunk->weight);
}
+
foreach_phase_irn(&env->ph, n) {
co_mst_irn_t *mirn = get_co_mst_irn(env, n);
aff_chunk_assure_weight(env, curr_chunk);
- DBG((dbg, LEVEL_1, "entry #%d", curr_chunk->id));
+ DBG((dbg, LEVEL_1, "entry #%u", curr_chunk->id));
DBG_AFF_CHUNK(env, LEVEL_1, curr_chunk);
DBG((dbg, LEVEL_1, "\n"));
DEL_ARR_F(edges);
}
-static void chunk_order_nodes(co_mst_env_t *env, aff_chunk_t *chunk)
+static __attribute__((unused)) void chunk_order_nodes(co_mst_env_t *env, aff_chunk_t *chunk)
{
- pqueue *grow = new_pqueue();
- int i;
+ pqueue_t *grow = new_pqueue();
+ const ir_node *max_node = NULL;
int max_weight = 0;
- ir_node *max_node = NULL;
+ int i;
for (i = ARR_LEN(chunk->n) - 1; i >= 0; i--) {
- ir_node *irn = chunk->n[i];
- affinity_node_t *an = get_affinity_info(env->co, irn);
+ const ir_node *irn = chunk->n[i];
+ affinity_node_t *an = get_affinity_info(env->co, irn);
int w = 0;
neighb_t *neigh;
for (i = ARR_LEN(chunk->n) - 1; i >= 0; --i)
bitset_add_irn(visited, chunk->n[i]);
- pqueue_put(grow, max_node, max_weight);
+ pqueue_put(grow, (void *) max_node, max_weight);
bitset_remv_irn(visited, max_node);
i = 0;
while (!pqueue_empty(grow)) {
- ir_node *irn = pqueue_get(grow);
+ ir_node *irn = pqueue_pop_front(grow);
affinity_node_t *an = get_affinity_info(env->co, irn);
neighb_t *neigh;
co_mst_irn_t *node = get_co_mst_irn(env, neigh->irn);
if (bitset_contains_irn(visited, node->irn)) {
- pqueue_put(grow, neigh->irn, neigh->costs);
+ pqueue_put(grow, (void *) neigh->irn, neigh->costs);
bitset_remv_irn(visited, node->irn);
}
}
{
waitq *nodes = new_waitq();
- DBG((dbg, LEVEL_1, "\n\tExpanding new chunk (#%d) from %+F, color %d:", chunk->id, node->irn, col));
+ DBG((dbg, LEVEL_1, "\n\tExpanding new chunk (#%u) from %+F, color %d:", chunk->id, node->irn, col));
/* init queue and chunk */
waitq_put(nodes, node);
if (an != NULL) {
neighb_t *neigh;
co_gs_foreach_neighb(an, neigh) {
- ir_node *m = neigh->irn;
- int m_idx = get_irn_idx(m);
+ const ir_node *m = neigh->irn;
+ int m_idx = get_irn_idx(m);
co_mst_irn_t *n2;
/* skip ignore nodes */
n2 = get_co_mst_irn(env, m);
- if (! bitset_is_set(visited, m_idx) &&
- decider(n2, col) &&
- ! n2->fixed &&
- ! aff_chunk_interferes(env, chunk, m) &&
- bitset_is_set(orig_chunk->nodes, m_idx))
+ if (! bitset_is_set(visited, m_idx) &&
+ decider(n2, col) &&
+ ! n2->fixed &&
+ ! aff_chunk_interferes(chunk, m) &&
+ node_contains(orig_chunk->n, m))
{
/*
following conditions are met:
aff_chunk_t *best = NULL;
for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *irn;
+ const ir_node *irn;
co_mst_irn_t *node;
aff_chunk_t *tmp_chunk;
decide_func_t *decider;
if (get_mst_irn_col(node) == col) {
decider = decider_has_color;
check_for_best = 1;
- DBG((dbg, LEVEL_4, "\tcolor %d wanted", col));
+ DBG((dbg, LEVEL_4, "\tcolor %d wanted\n", col));
}
else {
decider = decider_hasnot_color;
check_for_best = 0;
- DBG((dbg, LEVEL_4, "\tcolor %d forbidden", col));
+ DBG((dbg, LEVEL_4, "\tcolor %d forbidden\n", col));
}
/* create a new chunk starting at current node */
tmp_chunk = new_aff_chunk(env);
waitq_put(tmp, tmp_chunk);
expand_chunk_from(env, node, visited, tmp_chunk, c, decider, col);
- assert(bitset_popcnt(tmp_chunk->nodes) > 0 && "No nodes added to chunk");
+ assert(ARR_LEN(tmp_chunk->n) > 0 && "No nodes added to chunk");
/* remember the local best */
aff_chunk_assure_weight(env, tmp_chunk);
return best;
}
-/**
- * Initializes an array of color-cost pairs.
- * Sets forbidden colors to costs COL_COST_INFEASIBLE and all others to @p c.
- */
-static INLINE void col_cost_init(co_mst_env_t *env, col_cost_t *cost, double c) {
- int i;
-
- for (i = 0; i < env->n_regs; ++i) {
- cost[i].col = i;
- if (bitset_is_set(env->ignore_regs, i))
- cost[i].cost = COL_COST_INFEASIBLE;
- else
- cost[i].cost = c;
- }
-}
-
-/**
- * Initializes an array of color-cost pairs.
- * Sets all colors except color @p col to COL_COST_INFEASIBLE and @p col to 0.0
- */
-static INLINE void col_cost_init_single(co_mst_env_t *env, col_cost_t *cost, int col) {
- assert(! bitset_is_set(env->ignore_regs, col) && "Attempt to use forbidden color.");
- col_cost_init(env, cost, COL_COST_INFEASIBLE);
- cost[col].col = 0;
- cost[0].col = col;
- cost[0].cost = 0.0;
-}
-
/**
* Resets the temporary fixed color of all nodes within wait queue @p nodes.
* ATTENTION: the queue is empty after calling this function!
assert(!node->fixed);
assert(node->tmp_col < 0);
assert(node->list.next == &node->list && node->list.prev == &node->list);
+ assert(bitset_is_set(node->adm_colors, col));
list_add_tail(&node->list, changed);
node->tmp_col = col;
* Determines the costs for each color if it would be assigned to node @p node.
*/
static void determine_color_costs(co_mst_env_t *env, co_mst_irn_t *node, col_cost_t *costs) {
- affinity_node_t *an = get_affinity_info(env->co, node->irn);
- neighb_t *aff_neigh;
- bitset_pos_t idx;
- int i;
-
- col_cost_init(env, costs, 0.0);
-
- /* calculate (negative) costs for affinity neighbours */
- if (an != NULL) {
- co_gs_foreach_neighb(an, aff_neigh) {
- ir_node *m = aff_neigh->irn;
- co_mst_irn_t *neigh;
- double c;
-
- /* skip ignore nodes */
- if (arch_irn_is(env->aenv, m, ignore))
- continue;
-
- neigh = get_co_mst_irn(env, m);
- c = (double)aff_neigh->costs;
+ int *neigh_cols = alloca(env->n_regs * sizeof(*neigh_cols));
+ int n_loose = 0;
+ real_t coeff;
+ int i;
- /* calculate costs for fixed affinity neighbours */
- if (!is_loose(neigh)) {
- int col = get_mst_irn_col(neigh);
- costs[col].cost -= c * AFF_NEIGHBOUR_FIX_BENEFIT;
- }
- }
+ for (i = 0; i < env->n_regs; ++i) {
+ neigh_cols[i] = 0;
+ costs[i].col = i;
+ costs[i].cost = bitset_is_set(node->adm_colors, i) ? node->constr_factor : REAL(0.0);
}
- /* calculate (positive) costs for interfering neighbours */
for (i = 0; i < node->n_neighs; ++i) {
- co_mst_irn_t *neigh;
- int col, col_cnt;
- ir_node *int_neigh;
-
- int_neigh = node->int_neighs[i];
-
- assert(!arch_irn_is(env->aenv, int_neigh, ignore));
-
- neigh = get_co_mst_irn(env, int_neigh);
- col = get_mst_irn_col(neigh);
- col_cnt = bitset_popcnt(neigh->adm_colors);
-
- if (!is_loose(neigh)) {
- /* colors of fixed interfering neighbours are infeasible */
- costs[col].cost = COL_COST_INFEASIBLE;
- }
- else if (col_cnt < env->k) {
- /* calculate costs for constrained interfering neighbours */
- double ratio = 1.0 - ((double)col_cnt / (double)env->k);
-
- bitset_foreach_clear(neigh->adm_colors, idx) {
- /* check only explicitly forbidden colors (skip global forbidden ones) */
- if (! bitset_is_set(env->ignore_regs, idx)) {
- costs[col].cost += ratio * NEIGHBOUR_CONSTR_COSTS;
- }
- }
- }
-
- DB((dbg, LEVEL_4, "\tneigh %+F, loose: %d, color: %d\n", int_neigh, is_loose(neigh), col));
+ co_mst_irn_t *n = get_co_mst_irn(env, node->int_neighs[i]);
+ int col = get_mst_irn_col(n);
+ if (is_loose(n)) {
+ ++n_loose;
+ ++neigh_cols[col];
+ } else
+ costs[col].cost = REAL(0.0);
}
- /* set all not admissible colors to COL_COST_INFEASIBLE */
- bitset_foreach_clear(node->adm_colors, idx)
- costs[idx].cost = COL_COST_INFEASIBLE;
+ if (n_loose > 0) {
+ coeff = REAL(1.0) / n_loose;
+ for (i = 0; i < env->n_regs; ++i)
+ costs[i].cost *= REAL(1.0) - coeff * neigh_cols[i];
+ }
}
/* need forward declaration due to recursive call */
-static int recolor_nodes(co_mst_env_t *env, co_mst_irn_t *node, col_cost_t *costs, struct list_head *changed_ones, int depth);
+static int recolor_nodes(co_mst_env_t *env, co_mst_irn_t *node, col_cost_t *costs, struct list_head *changed_ones, int depth, int *max_depth, int *trip);
/**
* Tries to change node to a color but @p explude_col.
* @return 1 if succeeded, 0 otherwise.
*/
-static int change_node_color_excluded(co_mst_env_t *env, co_mst_irn_t *node, int exclude_col, struct list_head *changed_ones, int depth) {
+static int change_node_color_excluded(co_mst_env_t *env, co_mst_irn_t *node, int exclude_col, struct list_head *changed, int depth, int *max_depth, int *trip) {
int col = get_mst_irn_col(node);
int res = 0;
/* neighbours has already a different color -> good, temporary fix it */
if (col != exclude_col) {
if (is_loose(node))
- set_temp_color(node, col, changed_ones);
+ set_temp_color(node, col, changed);
return 1;
}
determine_color_costs(env, node, costs);
/* Since the node must not have the not_col, set the costs for that color to "infinity" */
- costs[exclude_col].cost = COL_COST_INFEASIBLE;
+ costs[exclude_col].cost = REAL(0.0);
/* sort the colors according costs, cheapest first. */
- qsort(costs, env->n_regs, sizeof(costs[0]), cmp_col_cost);
+ qsort(costs, env->n_regs, sizeof(costs[0]), cmp_col_cost_gt);
/* Try recoloring the node using the color list. */
- res = recolor_nodes(env, node, costs, changed_ones, depth + 1);
+ res = recolor_nodes(env, node, costs, changed, depth + 1, max_depth, trip);
}
return res;
* ATTENTION: Expect @p costs already sorted by increasing costs.
* @return 1 if coloring could be applied, 0 otherwise.
*/
-static int recolor_nodes(co_mst_env_t *env, co_mst_irn_t *node, col_cost_t *costs, struct list_head *changed_ones, int depth) {
+static int recolor_nodes(co_mst_env_t *env, co_mst_irn_t *node, col_cost_t *costs, struct list_head *changed, int depth, int *max_depth, int *trip) {
int i;
struct list_head local_changed;
- if (depth >= recolor_limit)
- return 0;
+ ++*trip;
+ if (depth > *max_depth)
+ *max_depth = depth;
- DBG((dbg, LEVEL_1, "\tRecoloring %+F with color-costs", node->irn));
- DBG_COL_COST(env, LEVEL_1, costs);
- DB((dbg, LEVEL_1, "\n"));
+ DBG((dbg, LEVEL_4, "\tRecoloring %+F with color-costs", node->irn));
+ DBG_COL_COST(env, LEVEL_4, costs);
+ DB((dbg, LEVEL_4, "\n"));
+
+ if (depth >= recolor_limit) {
+ DBG((dbg, LEVEL_4, "\tHit recolor limit\n"));
+ return 0;
+ }
for (i = 0; i < env->n_regs; ++i) {
int tgt_col = costs[i].col;
int j;
/* If the costs for that color (and all successive) are infinite, bail out we won't make it anyway. */
- if (costs[i].cost == COL_COST_INFEASIBLE) {
+ if (costs[i].cost == REAL(0.0)) {
+ DBG((dbg, LEVEL_4, "\tAll further colors forbidden\n"));
return 0;
}
*/
if (get_mst_irn_col(nn) == tgt_col) {
/* try to color neighbour with tgt_col forbidden */
- neigh_ok = change_node_color_excluded(env, nn, tgt_col, &local_changed, depth + 1);
+ neigh_ok = change_node_color_excluded(env, nn, tgt_col, &local_changed, depth + 1, max_depth, trip);
if (!neigh_ok)
break;
*/
if (neigh_ok) {
/* append the local_changed ones to global ones */
- list_splice(&local_changed, changed_ones);
+ list_splice(&local_changed, changed);
return 1;
}
else {
}
}
+ DBG((dbg, LEVEL_4, "\tAll colors failed\n"));
return 0;
}
* Tries to bring node @p node and all it's neighbours to color @p tgt_col.
* @return 1 if color @p col could be applied, 0 otherwise
*/
-static int change_node_color(co_mst_env_t *env, co_mst_irn_t *node, int tgt_col, struct list_head *changed_ones, int depth) {
+static int change_node_color(co_mst_env_t *env, co_mst_irn_t *node, int tgt_col, struct list_head *changed) {
int col = get_mst_irn_col(node);
/* if node already has the target color -> good, temporary fix it */
if (col == tgt_col) {
DBG((dbg, LEVEL_4, "\t\tCNC: %+F has already color %d, fix temporary\n", node->irn, tgt_col));
if (is_loose(node))
- set_temp_color(node, tgt_col, changed_ones);
+ set_temp_color(node, tgt_col, changed);
return 1;
}
-> try to recolor node and it's affinity neighbours
*/
if (is_loose(node) && bitset_is_set(node->adm_colors, tgt_col)) {
- col_cost_t *costs = alloca(env->n_regs * sizeof(costs[0]));
- int res;
+ col_cost_t *costs = env->single_cols[tgt_col];
+ int res, max_depth, trip;
- col_cost_init_single(env, costs, tgt_col);
+ max_depth = 0;
+ trip = 0;
DBG((dbg, LEVEL_4, "\t\tCNC: Attempt to recolor %+F ===>>\n", node->irn));
- res = recolor_nodes(env, node, costs, changed_ones, depth);
+ res = recolor_nodes(env, node, costs, changed, 0, &max_depth, &trip);
DBG((dbg, LEVEL_4, "\t\tCNC: <<=== Recoloring of %+F %s\n", node->irn, res ? "succeeded" : "failed"));
+ stat_ev_int("heur4_recolor_depth_max", max_depth);
+ stat_ev_int("heur4_recolor_trip", trip);
+
return res;
}
*/
static void color_aff_chunk(co_mst_env_t *env, aff_chunk_t *c) {
aff_chunk_t *best_chunk = NULL;
+ int n_nodes = ARR_LEN(c->n);
int best_color = -1;
- int did_all = 0;
+ int n_int_chunks = 0;
waitq *tmp_chunks = new_waitq();
waitq *best_starts = NULL;
+ col_cost_t *order = alloca(env->n_regs * sizeof(order[0]));
bitset_t *visited;
- int col, idx, len;
- struct list_head changed_ones;
+ int idx, len, i, nidx, pos;
+ struct list_head changed;
- DB((dbg, LEVEL_2, "fragmentizing chunk #%d", c->id));
+ DB((dbg, LEVEL_2, "fragmentizing chunk #%u", c->id));
DBG_AFF_CHUNK(env, LEVEL_2, c);
DB((dbg, LEVEL_2, "\n"));
- chunk_order_nodes(env, c);
+ stat_ev_ctx_push_fmt("heur4_color_chunk", "%u", c->id);
+
+ ++env->chunk_visited;
+
+ /* compute color preference */
+ memset(order, 0, env->n_regs * sizeof(order[0]));
+
+ for (pos = 0, len = ARR_LEN(c->interfere); pos < len; ++pos) {
+ const ir_node *n = c->interfere[pos];
+ co_mst_irn_t *node = get_co_mst_irn(env, n);
+ aff_chunk_t *chunk = node->chunk;
+
+ if (is_loose(node) && chunk && chunk->visited < env->chunk_visited) {
+ assert(!chunk->deleted);
+ chunk->visited = env->chunk_visited;
+ ++n_int_chunks;
+
+ aff_chunk_assure_weight(env, chunk);
+ for (i = 0; i < env->n_regs; ++i)
+ order[i].cost += chunk->color_affinity[i].cost;
+ }
+ }
+
+ for (i = 0; i < env->n_regs; ++i) {
+ real_t dislike = n_int_chunks > 0 ? REAL(1.0) - order[i].cost / n_int_chunks : REAL(0.0);
+ order[i].col = i;
+ order[i].cost = (REAL(1.0) - dislike_influence) * c->color_affinity[i].cost + dislike_influence * dislike;
+ }
+
+ qsort(order, env->n_regs, sizeof(order[0]), cmp_col_cost_gt);
+
+ DBG_COL_COST(env, LEVEL_2, order);
+ DB((dbg, LEVEL_2, "\n"));
/* check which color is the "best" for the given chunk.
* if we found a color which was ok for all nodes, we take it
* TODO Sebastian: Perhaps we should at all nodes and figure out
* a suitable color using costs as done above (determine_color_costs).
*/
- for (col = 0; col < env->n_regs && !did_all; ++col) {
- int one_good = 0;
+ for (i = 0; i < env->k; ++i) {
+ int col = order[i].col;
waitq *good_starts = new_waitq();
aff_chunk_t *local_best;
+ int n_succeeded;
/* skip ignore colors */
if (bitset_is_set(env->ignore_regs, col))
continue;
- DB((dbg, LEVEL_3, "\ttrying color %d\n", col));
-
- /* suppose we can color all nodes to the same color */
- did_all = 1;
+ DB((dbg, LEVEL_2, "\ttrying color %d\n", col));
- INIT_LIST_HEAD(&changed_ones);
+ n_succeeded = 0;
/* try to bring all nodes of given chunk to the current color. */
for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *irn = c->n[idx];
- co_mst_irn_t *node = get_co_mst_irn(env, irn);
- int good = 0;
+ const ir_node *irn = c->n[idx];
+ co_mst_irn_t *node = get_co_mst_irn(env, irn);
+ int good;
assert(! node->fixed && "Node must not have a fixed color.");
DB((dbg, LEVEL_4, "\t\tBringing %+F from color %d to color %d ...\n", irn, node->col, col));
The order of the colored nodes is important, so we record the successfully
colored ones in the order they appeared.
*/
- good = change_node_color(env, node, col, &changed_ones, 0);
+ INIT_LIST_HEAD(&changed);
+ stat_ev_tim_push();
+ good = change_node_color(env, node, col, &changed);
+ stat_ev_tim_pop("heur4_recolor");
if (good) {
waitq_put(good_starts, node);
+ materialize_coloring(&changed);
+ node->fixed = 1;
}
- one_good |= good;
- did_all &= good;
+ else
+ reject_coloring(&changed);
- DB((dbg, LEVEL_4, "\t\t... %+F attempt from %d to %d %s\n", irn, node->col, col, one_good ? "succeeded" : "failed"));
+ n_succeeded += good;
+ DB((dbg, LEVEL_4, "\t\t... %+F attempt from %d to %d %s\n", irn, node->col, col, good ? "succeeded" : "failed"));
+ }
+
+ /* unfix all nodes */
+ for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
+ co_mst_irn_t *node = get_co_mst_irn(env, c->n[idx]);
+ node->fixed = 0;
}
/* try next color when failed */
- if (! one_good) {
- reject_coloring(&changed_ones);
+ if (n_succeeded == 0)
continue;
- }
/* fragment the chunk according to the coloring */
local_best = fragment_chunk(env, col, c, tmp_chunks);
if (local_best) {
aff_chunk_assure_weight(env, local_best);
- DB((dbg, LEVEL_4, "\t\tlocal best chunk (id %d) for color %d: ", local_best->id, col));
- DBG_AFF_CHUNK(env, LEVEL_4, local_best);
+ DB((dbg, LEVEL_3, "\t\tlocal best chunk (id %u) for color %d: ", local_best->id, col));
+ DBG_AFF_CHUNK(env, LEVEL_3, local_best);
if (! best_chunk || best_chunk->weight < local_best->weight) {
best_chunk = local_best;
if (best_starts)
del_waitq(best_starts);
best_starts = good_starts;
- DB((dbg, LEVEL_4, "\n\t\t... setting global best chunk (id %d), color %d\n", best_chunk->id, best_color));
+ DB((dbg, LEVEL_3, "\n\t\t... setting global best chunk (id %u), color %d\n", best_chunk->id, best_color));
} else {
- DB((dbg, LEVEL_4, "\n\t\t... omitting, global best is better\n"));
+ DB((dbg, LEVEL_3, "\n\t\t... omitting, global best is better\n"));
del_waitq(good_starts);
}
}
del_waitq(good_starts);
}
- reject_coloring(&changed_ones);
+ /* if all nodes were recolored, bail out */
+ if (n_succeeded == n_nodes)
+ break;
}
+ stat_ev_int("heur4_colors_tried", i);
+
/* free all intermediate created chunks except best one */
while (! waitq_empty(tmp_chunks)) {
aff_chunk_t *tmp = waitq_get(tmp_chunks);
return;
}
- DB((dbg, LEVEL_2, "\tbest chunk #%d ", best_chunk->id));
+ DB((dbg, LEVEL_2, "\tbest chunk #%u ", best_chunk->id));
DBG_AFF_CHUNK(env, LEVEL_2, best_chunk);
DB((dbg, LEVEL_2, "using color %d\n", best_color));
- INIT_LIST_HEAD(&changed_ones);
for (idx = 0, len = ARR_LEN(best_chunk->n); idx < len; ++idx) {
- ir_node *irn = best_chunk->n[idx];
- co_mst_irn_t *node = get_co_mst_irn(env, irn);
+ const ir_node *irn = best_chunk->n[idx];
+ co_mst_irn_t *node = get_co_mst_irn(env, irn);
int res;
/* bring the node to the color. */
- DB((dbg, LEVEL_4, "\tManifesting color %d for %+F, chunk #%d\n", best_color, node->irn, best_chunk->id));
- INIT_LIST_HEAD(&changed_ones);
- res = change_node_color(env, node, best_color, &changed_ones, 0);
+ DB((dbg, LEVEL_4, "\tManifesting color %d for %+F, chunk #%u\n", best_color, node->irn, best_chunk->id));
+ INIT_LIST_HEAD(&changed);
+ stat_ev_tim_push();
+ res = change_node_color(env, node, best_color, &changed);
+ stat_ev_tim_pop("heur4_recolor");
if (res) {
- materialize_coloring(&changed_ones);
+ materialize_coloring(&changed);
node->fixed = 1;
}
+ assert(list_empty(&changed));
}
/* remove the nodes in best chunk from original chunk */
- bitset_andnot(c->nodes, best_chunk->nodes);
- for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *irn = c->n[idx];
+ len = ARR_LEN(best_chunk->n);
+ for (idx = 0; idx < len; ++idx) {
+ const ir_node *irn = best_chunk->n[idx];
+ int pos = nodes_bsearch(c->n, irn);
- if (bitset_is_set(best_chunk->nodes, get_irn_idx(irn))) {
- int last = ARR_LEN(c->n) - 1;
+ if (pos > 0)
+ c->n[pos] = NULL;
+ }
+ len = ARR_LEN(c->n);
+ for (idx = nidx = 0; idx < len; ++idx) {
+ const ir_node *irn = c->n[idx];
- c->n[idx] = c->n[last];
- ARR_SHRINKLEN(c->n, last);
- len--;
+ if (irn != NULL) {
+ c->n[nidx++] = irn;
}
}
+ ARR_SHRINKLEN(c->n, nidx);
+
/* we have to get the nodes back into the original chunk because they are scattered over temporary chunks */
for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *n = c->n[idx];
- co_mst_irn_t *nn = get_co_mst_irn(env, n);
+ const ir_node *n = c->n[idx];
+ co_mst_irn_t *nn = get_co_mst_irn(env, n);
nn->chunk = c;
}
/* fragment the remaining chunk */
visited = bitset_irg_malloc(env->co->irg);
- bitset_or(visited, best_chunk->nodes);
+ for (idx = 0, len = ARR_LEN(best_chunk->n); idx < len; ++idx)
+ bitset_set(visited, get_irn_idx(best_chunk->n[idx]));
+
for (idx = 0, len = ARR_LEN(c->n); idx < len; ++idx) {
- ir_node *irn = c->n[idx];
+ const ir_node *irn = c->n[idx];
if (! bitset_is_set(visited, get_irn_idx(irn))) {
aff_chunk_t *new_chunk = new_aff_chunk(env);
co_mst_irn_t *node = get_co_mst_irn(env, irn);
}
}
+ for (idx = 0, len = ARR_LEN(best_chunk->n); idx < len; ++idx) {
+ const ir_node *n = best_chunk->n[idx];
+ co_mst_irn_t *nn = get_co_mst_irn(env, n);
+ nn->chunk = NULL;
+ }
+
/* clear obsolete chunks and free some memory */
delete_aff_chunk(env, best_chunk);
bitset_free(visited);
if (best_starts)
del_waitq(best_starts);
+
+ stat_ev_ctx_pop("heur4_color_chunk");
}
/**
int co_solve_heuristic_mst(copy_opt_t *co) {
unsigned n_regs = co->cls->n_regs;
bitset_t *ignore_regs = bitset_alloca(n_regs);
- unsigned k;
+ unsigned i, j, k;
ir_node *irn;
co_mst_env_t mst_env;
+ last_chunk_id = 0;
+
+ stat_ev_tim_push();
+
/* init phase */
phase_init(&mst_env.ph, "co_mst", co->irg, PHASE_DEFAULT_GROWTH, co_mst_irn_init, &mst_env);
k = be_put_ignore_regs(co->cenv->birg, co->cls, ignore_regs);
k = n_regs - k;
- mst_env.n_regs = n_regs;
- mst_env.k = k;
- mst_env.chunks = new_pqueue();
- mst_env.co = co;
- mst_env.ignore_regs = ignore_regs;
- mst_env.ifg = co->cenv->ifg;
- mst_env.aenv = co->aenv;
- mst_env.chunkset = pset_new_ptr(512);
+ mst_env.n_regs = n_regs;
+ mst_env.k = k;
+ mst_env.chunks = new_pqueue();
+ mst_env.co = co;
+ mst_env.ignore_regs = ignore_regs;
+ mst_env.ifg = co->cenv->ifg;
+ mst_env.aenv = co->aenv;
+ mst_env.chunkset = pset_new_ptr(512);
+ mst_env.chunk_visited = 0;
+ mst_env.single_cols = phase_alloc(&mst_env.ph, sizeof(*mst_env.single_cols) * n_regs);
+
+ for (i = 0; i < n_regs; ++i) {
+ col_cost_t *vec = phase_alloc(&mst_env.ph, sizeof(*vec) * n_regs);
+
+ mst_env.single_cols[i] = vec;
+ for (j = 0; j < n_regs; ++j) {
+ vec[j].col = j;
+ vec[j].cost = REAL(0.0);
+ }
+ vec[i].col = 0;
+ vec[0].col = i;
+ vec[0].cost = REAL(1.0);
+ }
DBG((dbg, LEVEL_1, "==== Coloring %+F, class %s ====\n", co->irg, co->cls->name));
/* build affinity chunks */
+ stat_ev_tim_push();
build_affinity_chunks(&mst_env);
+ stat_ev_tim_pop("heur4_initial_chunk");
/* color chunks as long as there are some */
while (! pqueue_empty(mst_env.chunks)) {
- aff_chunk_t *chunk = pqueue_get(mst_env.chunks);
+ aff_chunk_t *chunk = pqueue_pop_front(mst_env.chunks);
color_aff_chunk(&mst_env, chunk);
- DB((dbg, LEVEL_4, "<<<====== Coloring chunk (%d) done\n", chunk->id));
+ DB((dbg, LEVEL_4, "<<<====== Coloring chunk (%u) done\n", chunk->id));
delete_aff_chunk(&mst_env, chunk);
}
/* apply coloring */
foreach_phase_irn(&mst_env.ph, irn) {
- co_mst_irn_t *mirn = get_co_mst_irn(&mst_env, irn);
+ co_mst_irn_t *mirn;
const arch_register_t *reg;
if (arch_irn_is(mst_env.aenv, irn, ignore))
continue;
+ mirn = get_co_mst_irn(&mst_env, irn);
// assert(mirn->fixed && "Node should have fixed color");
/* skip nodes where color hasn't changed */
phase_free(&mst_env.ph);
del_pset(mst_env.chunkset);
+ stat_ev_tim_pop("heur4_total");
+
return 0;
}
static const lc_opt_table_entry_t options[] = {
- LC_OPT_ENT_INT ("limit", "limit recoloring", &recolor_limit),
+ LC_OPT_ENT_INT ("limit", "limit recoloring", &recolor_limit),
+ LC_OPT_ENT_DBL ("di", "dislike influence", &dislike_influence),
LC_OPT_LAST
};
FIRM_DBG_REGISTER(dbg, "firm.be.co.heur4");
}
+
BE_REGISTER_MODULE_CONSTRUCTOR(be_init_copyheur4);
projects / libfirm / blobdiff